137990-42-2

1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,6-(1-hydroxyethyl)-4-methyl-7-oxo-3-[[5-[(2-oxo-3-pyrrolidinyl)methyl]-1-[(2-propenyloxy)carbonyl]-3-pyrrolidinyl]thio]-, 2-propenyl ester